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authorFredrik Schön <fredrikschon@gmail.com>2018-08-17 23:07:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-15 10:45:35 +0300
commit1e0750745bdffe0364ef8846af0561c9006bc77f (patch)
treebea84f667ddc96c29a1a9a141d78622a64de5db0 /drivers/gpu/drm
parent13b23ccfa28811333b866196e38d0bc35f68240d (diff)
downloadlinux-1e0750745bdffe0364ef8846af0561c9006bc77f.tar.xz
drm/i915: Increase LSPCON timeout
commit 299c2a904b1e8d5096d4813df6371357d97a6cd1 upstream. 100 ms is not enough time for the LSPCON adapter on Intel NUC devices to settle. This causes dropped display modes at boot or screen reconfiguration. Empirical testing can reproduce the error up to a timeout of 190 ms. Basic boot and stress testing at 200 ms has not (yet) failed. Increase timeout to 400 ms to get some margin of error. Changes from v1: The initial suggestion of 1000 ms was lowered due to concerns about delaying valid timeout cases. Update patch metadata. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107503 Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1570392 Fixes: 357c0ae9198a ("drm/i915/lspcon: Wait for expected LSPCON mode to settle") Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: <stable@vger.kernel.org> # v4.11+ Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Fredrik Schön <fredrik.schon@gmail.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180817200728.8154-1-fredrik.schon@gmail.com (cherry picked from commit 59f1c8ab30d6f9042562949f42cbd3f3cf69de94) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Fredrik Schön <fredrik.schon@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/i915/intel_lspcon.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c
index beb9baaf2f2e..f71fef10ecc6 100644
--- a/drivers/gpu/drm/i915/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/intel_lspcon.c
@@ -75,7 +75,7 @@ static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon,
lspcon_mode_name(mode));
wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode ||
- current_mode == DRM_LSPCON_MODE_INVALID, 100);
+ current_mode == DRM_LSPCON_MODE_INVALID, 400);
if (current_mode != mode)
DRM_DEBUG_KMS("LSPCON mode hasn't settled\n");